Details of interlocking installed at St. Lambert, Que, which replaces model-2 electric interlocking installed in 1913, and includes more extensive track layout, and provides for either direction train operation on each main track.
Canadian National installs large all-relay electric interlocking
Ry Signaling
Railway Signaling ; 36 , n 7
1943
Aufsatz (Zeitschrift)
Englisch
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